#!/usr/bin/env node
const log = console.log,
    usr = {       
        name:'zhangmenghuan',
        age:19,
        qq:'2645693345'
    };
log('name:\t%s',usr.name);
log('age:\t%d',usr.age);
log('usr:\t%j',usr);
log(usr.qq); 
console.log(usr.qq); 

console.error('Error:something wrong!');

console.table(usr); 
